Switch



' March 3, 1964 J w, RENTscHLER 3,123,175

ANTI-THEFTMEANS FOR FUEL DELIVERY TRUCK Original Filed Aug. 12; 1960 5Sheets-Sheet 1 NO RMAL neoonoen swncu IGNITION SYSTEM 6 2 I TAKE'OFFsvm'cn FIG. 3 4

ATTEMPT TO DRIVE PUMPlNG TALL! REOOR nsconoen swrrc swncu IGNITIONSYSTEM IGNITION SYSTEM INVENTOR JOHN WALTER RE/VTSCHLER ATTORNEYS March3, 1964 J. w. RENTSCHLER 7 ANTI-THEFT MEANS FOR FUEL DELIVERY TRUCKOriginal Filed Aug. 12, 1960 5 Sheets-Sheet 2 IN VENTOR JOHN WALTER RENTSGHLER ATTORNEYS March 3, 1964 J. w. RENTSCHLER 3,123,175

ANTI-THEFT MEANS FOR FUEL DELIVERY TRUCK Original Filed Aug. 12, 1960 5Sheets-Sheet 3 /30 g 08 ifi l3 INVENTOR ,1 JOHN WALTER RE/VTSGHLERATTORNEYS March 3, 1964 J. w. RENTSCHLER 3,123,175

ANTI-THEFT MEANS FOR FUEL DELIVERY TRUCK Original Filed Aug. 12, 1960 5Sheets-Sheet 4 GRAVITY DISPENSING SYSTEM I RECORDER l asconozn swn'crlIGNITION SYSTEM IGNITION svsrsu TAKEOFF SWITCH FIG. /5 FIG. /6'

Q- PRESSURE OPERATED 7 SWITCH FUEL DIESEL-POWER VEHICLE LINE RECORDERSWITCH TAKE-OFF SWITCH ELECTRIC POWER VEHICLE R RDER TAKE- F SWIINVENTOR JOHN WALTER RENTSCHLEI? BY M l ATTORNEYS March 3, 1964 J. w.RENTSCHLER 3,123,175

ANTI-THEFT MEANS FOR FUEL DELIVERY TRUCK Original Filed Aug. 12, 1960 5Sheets-Sheet 5 DiESEL'POWER VEHICLE TAKE-OFF SWITCH PRESSURE'OPERATEDSWITCH ELECTRIC'POWER VEHICLE TAKE OFF SWITCH PRESSURE OPERATED SWITCHINVENTOR JOHN WALTER RENTSGHL ER ATTORNEYS United States Patent (Ilaims.(Cl. 180-82) This invention relates to an anti-theft means for a fueldelivery truck. More specifically, this invention relates to meanswhereby a dishonest fuel delivery truck attendant is precluded frommaking a short elivery. By short delivery is meant a partial delivery toone customer, a second delivery to a favored customer and a billing ofthe first customer for both deliveries. This application is a divisionalapplication of my copending parent application Ser. No. 49,214, filedAugust 12, 1960.

It is presently the practice in the delivery of fuel from a vehicle touse a saleslip impressed by a recorder associated with the meter of thevehicle. A. typical recorder is disclosed in the U.S. Patent 2,204,922which issued June 18, 1950, to W. F. Berck. Under this practice, therecorder is actuated twice for each delivery. It is first actuated torecord on the saleslip the reading of the meter at the commencement ofthe delivery. Later, it is actuated after delivery to impress on thesame saleslip the reading of the meter at that time. Means are providedto prevent removal of the saleslip between impressions. It can be seenthat the amount of the delivery is the difference in the two readings.The saleslip is left with the customer and a duplicate copy is takenback to the fuel oil delivery ofiice for billing purposes.

It has been possible with arrangements in the past for a dishonestdelivery man to actuate the recorder at the beginning of the delivery,make a partial delivery to a first customer, and then to drive to afavored customer, dispense a second delivery, and then actuate therecorder for a second time. The saleslip would then be returned to thefirst customer who is then billed for both deliveries.

Under the present invention, the dishonest attendant is precluded fromsuch practice. Any attempt he may make will be thwarted by hisinstability to drive the vehicle until the recorder is actuated for thesecond time. My invention includes means associated with the meterdisabling the vehicle-propulsion means during the time between therecordings of the meter.

It is therefore an object of this invention to provide means disablingfor propulsion purposes the engine of a fluid delivery truck until theend-of-delivery recording has been made on the saleslip.

It is a further object of the invention to provide for a fuel deliverytruck anti-theft means of foolproof and reliable nature.

It is a further object of this invention to provide for a fuel deliverytruck anti-theft means which may be readily sealed against tampering.

It is a further object of the invention to provide for a fuel deliverytruck anti-theft means which may be easily checked to see if it isfunctioning properly.

It is a further object of this invention to provide for a fuel deliverytruck anti-theft means which may be incorporated into existing equipmentby an inexpensive, simple modification.

This invention embodies other novel features, details of constructionand arrangement of parts which are hereinafter set forth in thespecification and claims, and illustrated in the accompanying drawings,wherein:

FIG. 1 is a perspective view showing in broken outline a delivery truckand showing schematically in solid lines 3,123,175 Patented Mar. 3, 1964"ice placen ent of the various components embodying the invention;

FIGS. 2 through 4 inclusive are schematic diagrams of a circuit invarious conditions, said circuit embodying the invention;

FIG. 5 is a rear elevational view of a meter recorder embodying theinvention and having the rear portion of its housing removed;

FIG. 6 is a side elevational view of a meter recorder embodying theinvention and having the rear portion of its housing removed;

FIG. 7 is a fragmentary top plan view of a meter recorder embodying theinvention and having the rear portion of its housing removed;

FIG. 8 is a perspective view of a switch and switch bracket as used in ameter recorder embodying the invention;

FIG. 9 is a fragmentary rear elevational view of a meter recorderembodying the invention;

FIG. 10 is a fragmentary side elevational view of a meter recorderembodying the invention and having part of the rear housing broken away;

FIG. 11 is a fragmentary front elevational view of an ignition coil asused in an embodiment of the invention;

FIG. 12 is a fragmentary side elevational view of an ignition coil asused in an embodiment of the invention;

FIG. 13 is a top plan view of pump take-off drive means as used in anembodiment of the invention;

FIG. 14 is a side elevational view of a pump take-off as used in anembodiment of the invention;

FIGS. 15 through 18 are schematic diagrams of electrical circuitsembodying modified forms of the invention;

FIG. 1.9 is a schematic diagram of the electrical circuit according toH6. 17 with a pressure operated switch as in FIG. 16 incorporated; and

FIG. 20 is a schematic diagram of the electrical circuit according toFIG. 18 with a pressure operated switch as in FIG. 16 incorporated.

Briefly, the invention comprises in combination a fluid dispensingvehicle having propulsion motor means, meter recording means adapted tobe provided with a saleslip to be impressed by said recording meansbefore and after the dispensation of fluid from the vehicle, and meansassociated with the meter recording device to deactivate said propulsionmotor means when an attempt is made to drive said vehicle during theperiod between the beforeand after-delivery recordings.

Referring more specifically to the drawings, a fuel delivery truckembodying the invention is designated 10 in FIG. 1. Mounted in the truckis the engine or motor propulsion means having its ignition coil, thefuel delivery pump, and take-off means connected between the engine andthe pump. Also mounted on the vehicle is a meter recorder driven by ameter through which the dispensed fluid travels. The recorder is adaptedto receive a saleslip S. The mounting of the engine, pump, takeoff, andmeter recorder are well known in the art.

The meter recorder is shown in FIGS. 5, 6, and 7, and is designated 30.It may comprise a stationary frame 32 mounted in a vertical position andhaving a plurality of rearwardly directed studs 34. A saleslipsupporting tray 36 is provided with a plurality of slots receiving thestuds 34 respectively whereby the tray is adapted to reciprocatevertically with respect to the frame 32. Mounted in the frame by meanswell known in the art are type segments 40 operatively connected to themeter. These segments are exposed through a window 42 in the tray. Ablock 44 extends rearward at the lower end of the frame 32 and anchorsone end of a movable arm 46. The upper end of the arm is provided with aroller platen 48. The arm is adapted to oscillate so that the rollerplaten rolls over the faces of the type segments 4%. It will be notedthat the tray carries a punch lever 50 having a sharp end adapted toextend through a slot in the tray to retain the saleslip. The tray 36,the moving platen 4%, and the punch lever 50 are all driven by a crank52 disposed for operation on the outside of the housing.

In use, prior to delivery the saleslip is inserted in the recorderbetween the tray 36 and the frame 32. The tray at this time is in theelevated position shown in broken lines in FIG. and the moving platen 43in the leftward position also shown in broken lines. The attendant thenturns the crank 52 through its first cycle. The punch lever 50 driven bythe crank pierces the saleslip, holding it from removal. The movingplaten 48 swings over the type segments as, impressing thebeforedelivery reading on the slip, and assumes the position shown infull lines. The tray 36 then lowers to the position shown in full lines,carrying the slip down with it.

After the dispensation of fluid, the attendant turns the crank 52 in 'areverse direction. The moving platen 4-8 swings to the leftward positionshown in dotted lines passing over the type segments 49 disposed intheir new reading and recording the reading on the slip. The tray 36moves to the original elevated position, and the punch lever 50 releasesthe saleslip for removal from the recorder.

In the preferred embodiment of the invention a switch 54 is mountedrigidly against the frame 32 of the recorder. The switch best suited forthis purpose has been found to be of the micro-switch type having aplunger actuator 56 of short travel and being structurally designed sothat an electric circuit connected thereto is normally held open byspring means within the switch housing. The circuit may be closed bydepression of the plunger against the force of the spring.

As shown in FIG. 5, the switch is mounted against the frame 32 in such aposition that the plunger 56 is directed upwardly and that the housingof the switch is spaced outward from the recorder so that it does notinterfere with the movement of the tray 35. It has been found that themounting of the switch in a rigid and proper placement is extremelyimportant. As is best shown in FIG. 8, the mounting means for themicro-switch comprises a bracket 53 having a sturdy sheet metal housingfeaturing three intersecting planar walls 58a, 58b, 58c.

. The presence of these three intersecting walls has been foundeffective because it creates a box-like structure of substantialstrength. The upper horizontal wall 58a of this structure is firmlyfixed in position and it is to this wall that the switch 54 is secured.It is important that this top wall 58a be firmly fixed because thepressure in actuating the switch is in a downward direction and were thewall not fixed such pressure would bend the wall and work the switch outof position. The top wall 58a of the switch bracket is formed preferablywith a pair of tapped apertures which threadedly receive mounting bolts60 extending up through the switch from underneath. These bolts urge thetop wall of switch S4 firmly against the underside of the top Wall 5852of the bracket. If it is desired to lower slightly the vertical positionof the switch, shims may be disposed between the top wall 58a of thebracket andthe switch 54.

Extending perpendicular from the partial vertical wall .580 of thebracket and disposed in a plane parallel to the movement of the switchplunger is a flat elongate mounting arm 62. The arm is of considerablewidth and is provided with a pair of spaced apertures through whichextend mounting bolts 64 which engage in tapped holes in the rear faceof the block 44 to hold the bracket 58 securely.

To effect movement of the switch plunger 56, upon the movement of thesaleslip tray, there is provided an L-shaped co-acting means 66. Thismeans comprises a flat elongate vertical leg 63 which is secured by apair of short mounting bolts 70 against the saleslip tray in an areaabove the switch plunger 56. Directed perpendicular from the lower endof this vertical leg is a shorter horizontally disposed arm 72 (see FIG.6). The co-acting means is fashioned from sturdy strip material which isnot likely to flex or bend.

Reviewing the operation of the recorder once more, with the switch andits co-acting means in mind, it will be noted that after thebefore-delivery printing the tray 36 lowers to the position shown insolid lines in FIG. 5. In doing so, it advances arm 72 down to engageand depress the switch plunger 56. Such depression of the plunger closesthe electric circuit in which the switch is associated. The circuitwill, of course, remain closed until the arm 72 raises from the plungeras the tray returns to its initial elevated position after theend-of-delivery printing.

It will be understood that the switch 54 and arm 72 must be positionedrelatively so that the switch cannot be released to return to itselectrically open disposition until the end-of-delivery printing ismade. This is one reason why the positioning of the switch is critical.

Circuit and General Operation In the preferred embodiment as diagrammedin FIG- URE 2, the recorder switch, above described, is in' serieselectrically with a pump take-off switch. The pump takeoff switch ismounted adjacent the pump power take-off and is arranged to beelectrically open when the take-off is engaged as will be explained.These two switches are electrically in series circuit between theignition system and the metal frame of the vehicle so that when therecorder switch is electrically closed (see FIG. 4) and the take-offswitch is electrically closed, the ignition system is grounded, shortingout the spark plugs and making the engine inoperative. FIGURE 3discloses the disposition of the two switches during the dispensingwherein the recorder switch is closed and the pump take-off switch iselectrically open because the take-off is engaged. Because one of thesetwo switches is open, the engine will continue to operate.

With respect to the arrangement shown in FIGURES 2, 3, and 4, forexample, the operator has parked his oil delivery truck and is ready tomake a delivery. The power take-off is engaged and switch lever 136, seeFIG. 13, pivots the take-01f switch housed within box 132 toelectrically open position. A saleslip is inserted into the tray 36, seeFIG. 5, of the, recorder, the tray 36 being in the up position asindicated by broken line in FIG. 5. The attendant then turns the crank52 through its first cycle. The punch lever 5h driven by thecrankpierces the saleslip; holding it from removal. The moving plate 4-8swings from the broken line position over the type segments 40impressing the before-delivery reading on the slip. The tray 36 carryingthe saleslip has now lowered to the position shown in full lines and arm72 has moved down with the tray to push the actuator 56 of the recorderswitch 58 down to electrically closed position as shown in FIGS. 3 and4.If a partial delivery is made and saleslip is left in the recorder withthe tray in the down position and unmoved and it is desired to move thetruck, the power take-off must be disengaged. If the power take-off isdisengaged, the arm 136 will swing and rotate the power take-off switchin the box 132, see FIG. 13, and that switch will close. This willcomplete a circuit from the ground lead terminal of the ignition coil-ofthe ignition system as shown in FIG. 4 and the coil will be continuouslyconnected to ground on the frame of the truck and the propulsion motorof the truck will stop.

A situation can be conceived wherein the dishonest attendant determinedto make a short delivery and aware of the circuit employed by theinvention, will attempt to drive the vehicle during the time betweenprintings of the recorder while the take-off is engaged. Because thetake-01f switch is open, the engine will operate. This attempt at theftwill, however, be evidenced by the destruction of the delivery pumpwhich is not designed to withstand operation at the high speeds ofrotation necessary in driving. Thus, to drive the truck withoutdestroying the pump, it is first necessary to disengage the deliverypump take-01f. The disengagement closes the pump takeoli switch.

Sealing of the System In order that the dishonest attendant be deterredfrom tampering with the circuit employed, the various parts may besealed against intrusion. The present means is easily adapted to suchprotection. As shown in FIG- URES 9 and 10 the electric leads 8ll82 tothe recorder switch are individually shielded and penetrate the recorderhousing as in tamperproof fashion. In the preferred embodiment, the rearwall of the recorder housing 84 has adjacent the micro-switch 54 anopening which is provided with a cover plate 86 bolted in place on therear of the housing. The bolts 88 have their shanks directed outward sothat nuts are exposed from the outside of the housing. Each bolt has anaperture adjacent its nut and intermediate the nut and the end of itsshank. The plate 66 is formed with a pair of spaced apertures each ofwhich may receive an elbow fitting 90 having a reduced and threaded end,each end being secured in the plate 86 by a nut 92 within the housing.The nut threadedly engages the threaded end of the elbow and clamps itagainst the plate $6. Each of the elbow fittings is provided adjacentits distal end with an encompassing 'C-shaped clamp 94 having a bolt andnut drawing its ends together. The bolts of the clamps have apertures intheir shanks adjacent the nut and between the nut and the end of theshank opposite the head. A sealing wire 93 extends through all of theapertures in the bolt shanks, and the ends of the sealing wire arejoined together by a lead seal 1%. Alternatively, the nuts also may beapertured and the scaling wire extend through each bolt and nut as iswell known in the art. Thus, it is impossible for one to tamper with theshielded cables 8% 82, leading to the recorder switch without breakingthe seal 1%. The recorder housing 84, of course, is sealed closed in thecustomary fashion.

FIGURES 11 and 12 disclose the means by which the shielded cable isconnected to the ignition system coil 162 in tamperproof fashion. Theshielded cable lead 86 extending from the recorder switch is connectedto one of the coil terminals 1M. A clamp res completely encompasses theside wall of the coil and extends in clamping fashion over the shieldedcable. The clamp 1% is drawn tight by a bolt 1% and nut, the bolt havingan aperture in its shank adjacent the nut and between the nut and theend of the shank. After the clamp is applied and the nut taken up, asealing wire 11%) is passed through the aperture. To the ends of thewire is afiixed a lead seal 112. Extending upwardly from theencompassing clamp is a rigid hood member 114 which covers the terminalof the coil and prevents access thereto. It does not, however, interferewith the normal ignition system connections to the coil terminals (notshown). As shown in FIGURE 12, the hood terminates upwardly in aninverted boxshaped member, the walls of which are spaced from theterminal 104 to avoid short circuiting.

It is thus impossible for one to remove the shielded cable till from itsconnection to the coil terminal Hi4 without breaking the seal 112 andremoving the coil-encompassing clamp ms.

The mounting of the pump take-off switch is disclosed in l3 and 14wherein the pump take-oil housing is designated 1%. It comprises adome-shaped member 122. having extending therefrom a mounting flange 124by which the unit is mounted on the vehicle transmission. The housingmounts an engagement actuator rod 126 operated by a conventional controllinkage which is not shown. Axial movement of the actuator rod 126engages or disengages the gears within the housing. The

take-off drive shaft 128 extends out of the housing below the actuatorrod 126. On the flange 124 is mounted an upstanding leg 136. To theupper end of this leg is rigidly mounted a cup-shaped switch box 132having a central upstanding switch stern 134 adapted in rotation tooperate a switch within the box. The stem I134 has secured to it a lever136 which extends out and is loosely connected to the take-oh?engagement actuator rod 126. One of the terminals of the switch withinthe cup-shaped box is grounded to the frame of the box 132 and hence tothe metal frame of the vehicle. The other terminal is connected to theend of the shielded cable 82 from the recorder switch which extendsthrough an opening in the cylindrical box 132.. A C-shaped clamp 138encompasses the box and holds its two flanged similar halves together.This clamp is drawn together by a bolt 1% and nut similar to the one onthe clamp used in connection with the coil i192 above. As shown, thebolt is apertured adjacent the nut and a sealing wire passing throughthe opening in the bolt and a lead seal preclude tampering. Cable 82.extends in an opening in the bottom of the lower half of the box. Theopening has an outwardly extending flange thereabout which receivesanother 'fi-shaped clamp drawn up about cable 82 by bolt 142 having anut and being apertured and sealed as bolt M 3.

Thus as the linkage which operates the take-off actuator reciprocates,it oscillates the switch lever 136 to turn on and off the switch withinthe box 132. As indicated above, the switch is normally in theelectrically closed disposition, but when the take-oil gears areengaged, the switch is in the electrically open disposition.

Alternative Circuits Involving the Invention Other embodiments of thecircuit involving the invention are shown in FIGURES 15-18. FIGURE 15shows schematically a circuit embodying the invention as it would beadapted to a gravity-dispensing system wherein no driven pump means areused. In such a system, simply, the recorder switch is connected betweenthe ignition system and the metal frame of the vehicle or other groundso that the ignition is shorted and the engine may not operate betweenthe initial and final printing of the recorder.

FTGURE 16 shows a modified form of a circuit embodying the inventionwherein a pressure switch is employed. The pressure-sensitive actuatorof this switch is connected to the outlet of the pump. This pressureswitch is disposed in a parallel electrical circuit with the pumptake-off switch. Employing such an arrangement, if an attempt is made todrive the vehicle away between the recordings and with the take-oilswitch in the open position, the pressure built up by the pump willclose the pressure switch to short out the ignition system. In thepreferred circuit embodying the invention, shown in FIGURES 2, 3 and 4,no such pressure switch is used. It has been found that the risk ofdestroying the pump by excess speed is enough to deter such an attempt,as explained above. However, in the alternative circuit embodying theinvention is shown in FIGURE 16 this extra precaution is incorporated.

FIGURE 17 is a schematic diagram of a circuit by which the invention maybe embodied in a diesel-powered vehicle. This diagram discloses therecorder switch and the pump take-off switch in series with a source ofelectric power P. A solenoid-operated valve V in the engine fuel linecompletes the circuit. Thus when both the recorder switch and thetake-off switch are closed, the fuel line will be closed, cutting offthe supply of fuel to the vehicle.

FIGURE 18 discloses a circuit embodying the invention in anelectric-powered vehicle. In this embodiment, the recorder and the takeoif switches are again in series with a power supply and asolenoid-operated means. The solenoid-operated means in this case is anormally closed power switch S, which, when both the recorder and thetake-oil switch are closed, is driven to electrically open disposition.The opening of the power switch opens the propulsion circuit of theelectric-powered vehicle to cut oil its motor.

FIGS. 19 and 20 show further modifications of the invention wherein afluid-pressure operated switch operator is connected to the'dischargeside of the fluid delivery pump for actuation of the pressure-operatedswitch to closed position on excess pressure from the pump wherebyattempted driving of the vehcile with the recorderswitch actuated by themeter closed and the power takeoif operative, whereby the take-offswitch would then be open, creates pressure delivery by the pump toclose the pressureoperated switch to complete a circuit from the powersource to prevent operation of the vehicle motor propulsion mechanism.The solenoid operated power switch S here in FIG. 20 is the same asexplained above in FIG. 18, namely, a normally closed power switch andwhenboth the recorder switch and the pressure-operated switch are closedwith take-oil switch open, the power switch S is driven to electricallyopen disposition by its energized solenoid.

While this invention has been shown in but only a few forms, it will beobvious to those skilled in the art that it is not so limited but thatit is susceptible of various changes and modifications without departingfrom the scope of the claimed invention.

I claim:

1. Apparatus for preventing delivery of fluid in a fluid dispensingvehicle having a motor propulsion mechanism including a fuel supplysystem with an electrically opesated fuel cut-off means therein, abefore and after delivery slip printing and recording meter and a powertakeoil" device from said propulsion mechanism for driving a fluiddispensing pump, comprising in combination, an electrical normally openswitch attached to said meter for actuation thereby to closed positionduring the time between before and after deliver slip printing, anelectrical normally open switch attached adjacent the power takeoffdevice for actuation to open position when said power take-oil deviceis'operative, a source of electrical power, an electrical commonconductor connecting one terminal of each of said switches, anelectrical conductor connecting the other terminal of one of saidswitches with said source of electrical power and an electricalconductor connecting the other terminal of the other of said switchesand said electrically operated fuel cut-oil means whereby to provide aseries circuit to the fuel cut-oil means to cut oil the fuel supply tothe motor propulsion mechanism should closure take place of said switchoperated by the power take-off while said switch operated by the meteris closed.

2. Apparatus for preventing delivery of fluid in a fluid dispensingvehicle according to claim 1 including a fluid pressure normally openswitch connected to the discharge side of the fluid delivery pump foractuation to closed position on excess pressure from the pump, anelectrical conductor connecting one terminal of said pressure switch tothe source of electrical power and an electrical conductor connectingthe other terminal of said presure switch and said common electricalconductor electrically connecting said first two mentioned switcheswhereby atempted driving of said vehicle with said switch'actuated bythe meter closed and the power take-oil operative creates pressuredelivery by said pump to close said pressure switch to complete acircuit from the power source to said electrically operated fuel cut-oilmeans to cut off the fuel to said vehicle motor propulsion mechanism.

3. An apparatus for preventing delivery of fluid in a fluid dispensingvehicle according to claim 1 wherein said electrical conductors areencased in armored sheaths and all connections are sealed in anti-tampermeans.

4. Apparatus for preventing delivery of fluid in a fluid dispensingvehicle having a motor propulsion mechanism including a fuel supplysystem with an electrically operated cut-oil means therein, a before andafter delivery slip printing and recording meter and a power take-oildevice from said propulsion mechanism for driving a fluid dispensingpump, comprising in combination, an electrical power supply, anelectrical normally open switch attached to said meter for actuationthereby to closed position during the time between before and afterdelivery slip printing, a fluid pressure normally open switch connectedto the discharge side of the fluid delivery pump for actuation to closedposition on excess pressure from the pump, an electrical commonconductor connecting one terminal of each of said switches, anelectrical conductor connecting the other terminal of one of saidswitches with said electrical power supply, and an electrical conductorconnecting the other terminal of the other of said switches and aportion of said electrically operated cut-oil means whereby to provide aseries circuit to the electrically operated cut-off means to disablesaid propulsion system.

5. An apparatus for preventing delivery of fluid in a dispensing vehicleaccording to claim 4 wherein said electrical conductors are encased inarmored sheaths and all connections are sealed in anti-tamper means.

References Cited in the file of this patent UNITED STATES PATENTS2,637,407 Burk et al May 5 ,1953 2,707,577 Trotter et al. May 3, 19552,946,485 Burner July 26, 1960 3,039,556 Canavotto June 19, 1962

1. APPARATUS FOR PREVENTING DELIVERY OF FLUID IN A FLUID DISPENSINGVEHICLE HAVING A MOTOR PROPULSION MECHANISM INCLUDING A FUEL SUPPLYSYSTEM WITH AN ELECTRICALLY OPERATED FUEL CUT-OFF MEANS THEREIN, ABEFORE AND AFTER DELIVERY SLIP PRINTING AND RECORDING METER AND A POWERTAKEOFF DEVICE FROM SAID PROPULSION MECHANISM FOR DRIVING A FLUIDDISPENSING PUMP, COMPRISING IN COMBINATION, AN ELECTRICAL NORMALLY OPENSWITCH ATTACHED TO SAID METER FOR ACTUATION THEREBY TO CLOSED POSITIONDURING THE TIME BETWEEN BEFORE AND AFTER DELIVER SLIP PRINTING, ANELECTRICAL NORMALLY OPEN SWITCH ATTACHED ADJACENT THE POWER TAKEOFFDEVICE FOR ACTUATION TO OPEN POSITION WHEN SAID POWER TAKE-OFF DEVICE ISOPERATIVE, A SOURCE OF ELECTRICAL POWER, AN ELECTRICAL COMMON CONDUCTORCONNECTING ONE TERMINAL OF EACH OF SAID SWITCHES, AN ELECTRICALCONDUCTOR CONNECTING THE OTHER TERMINAL OF ONE OF SAID SWITCHES WITHSAID SOURCE OF ELECTRICAL POWER AND AN ELECTRICAL CONDUCTOR CONNECTINGTHE OTHER TERMINAL OF THE OTHER OF SAID SWITCHES AND SAID ELECTRICALLYOPERATED FUEL CUT-OFF MEANS WHEREBY TO PROVIDE A SERIES CIRCUIT TO THEFUEL CUT-OFF MEANS TO CUT OFF THE FUEL SUPPLY TO THE MOTOR PROPULSIONMECHANISM SHOULD CLOSURE TAKE PLACE OF SAID SWITCH OPERATED BY THE POWERTAKE-OFF WHILE SAID SWITCH OPERATED BY THE METER IS CLOSED.